Egad Amanullah... that's one heck of a time deadline. I don't know that I can make a credible tutorial on blends and variable section sweeps that gives a detailed explanation so you don't have to ask any further questions in the time frame you need.
I can do it... but I can't get it done essentially by ... now.
For the simplest blend you're basically going to set up some parallel planes some distance apart. On each plane you're going to sketch a cross section. When you're done you'll have 2, 3, 4, or more planes each with their own sketched cross section. The trick is to keep the same number of elements in each sketch. For example, if you're sketching a box with rounded corners, you have 8 elements... 4 long sides and 4 rounded arc-shaped corners. Each cross section needs to have 8 elements. If you need to use cross sections with less elements... such as when a wing tapers, you need to use a special point called a Blend Vertex.
There are other factors... line each cross section has a directional arrow which should always be pointing in the same direction.
There are probably a dozen tips, tricks, and little nuances and subtleties you have to know to use the blend feature correctly. And this is just for a standard parallel blend. If you get into general blends and rotational blends, there are even more things to know.
Variable Section Sweeps are another whole issue altogether. There's a primary trajectory and optional X-vector trajectory and potentially multiple other tangent trajectories to control the shape of your sweep.
And once you master all of that... then you can move on to the queen mother of all hybrids... the Swept Blend which is yet another twist. I'm not even sure they still have Swept Blends in Creo the way things have been combined and reconfigured I have to play with it to find out.
Unfortunately this is just not something that can be done quickly... it pains me to say that and I hate to let someone down. My best advice when you're under the gun... use solid features and hack the heck out of it with cuts then add rounds like there's no tomorrow. You'd be amazed what you can do with some well placed rounds. Seriously... if you round something heavily enough you can make it look very much like a blend.
I feel for you Amanullah... good luck. If you manage to come up with more time, write back and I'll take a crack at creating a tutorial for you. Tell the professor the dog ate your homework... that's been known to work (although rarely).
Good luck!
-Brian
..
that was funny and thanks for all the details again...
